html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
}

.cont {
    height: 100%;
    padding: 8px;
    box-sizing: border-box;
    background-image: url("image/splash.jpg");
    background-size: auto 100%;
    background-repeat: no-repeat;
    background-position: center;
}

iframe {
  height: 100%;
  width: 100%;
  border: 0;
}

.btn {
    display: inline-block;
    font-weight: 400;
    color: #212529;
    text-align: center;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: .375rem .75rem;
    font-size: 1rem;
    line-height: 1.5;
    cursor: pointer;
    border-radius: .25rem;
    transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}

#installPanel {
    position: absolute;
    padding: 5px;
    justify-content: space-between;
    align-items: center;
    width: 280px;
    display: none;
    z-index: 1;
    top: 10px;
    background-color: wheat;
    border-radius: 5px;
    border: 1px solid darkgrey;
    font-family: Arial, Helvetica, sans-serif;
}

#installPanel.animate {
    animation: slideInFromTop 0.6s 1 ease-out forwards;
}

@keyframes slideInFromTop {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#closebtn {
    align-self: flex-start;
    cursor: pointer;
}